College student Christine Dark wasn't happy. Her social life sucked, she spent too much of her time playing computer games or reading sci-fi novels (and the occasional paranormal romance) and she felt like she was missing out on everything. Fate had something special in store for her, though. Without warning, an unknown force drags Christine out of her world and takes her to a whole new universe, an alternate Earth where superhuman beings have existed since the end of World War One, a world filled with strange and dangerous characters. Christine soon learns she too is more than human, and that her choices may save her new home... or bring about its destruction.

"Even better than the first one, which I enjoyed a hell of a lot. Boffo superhero action, metaphysical speculation, and—much rarer—real character development.... I will be following this series to the end, and advise others to do so too!" - S.M. Stirling, NYT's Best-Selling Author In the sequel to Armageddon Girl, Christine Dark and Face-Off must face their inner demons while they try to save Earth Alpha, a world where superheroes are real and danger is everywhere. Can a former gamer chick endowed with cosmic powers and a murderous vigilante deal with their differences - and their growing attraction for one another - and escape the shadowy forces hunting them? Meanwhile, Ultimate the Invincible Man finds himself a wanted man, persecuted by his former colleagues; Condor and Kestrel fight for justice while indulging their twisted sexual desires; and Cassius Jones, the hero known as Janus, reveals the terrible things he discovered during his exodus in outer space. Filled with action, adventure and romance, Doomsday Duet continues to explore a world filled with superhuman beings with all too human failings. REVISED EDITION: The newest version of the book has cleaned up extensively (the book's original proofreader dropped the ball rather badly). If you've purchased a copy of the book prior to 9/25/14, you might want to upload the new version (you can do so through the Manage Your Content and Devices section of your account). (NOTE: Contains violence, sexual content and adult language)

The End Is Here. Christine Dark and Mark Martinez face their greatest challege yet. Captured by the Dominion of the Ukraine, where they face torture and death, they must find a way to outsmart the Iron Tsar, escape, and deliver the world from utter destruction. Meanwhile, other heroes and villains forge alliances or battle each other as the fate of Earth Alpha, an alternate reality where superheroes are only too real, hangs in the balance.